US2949975A - Pneumatic tool muffle - Google Patents

Pneumatic tool muffle Download PDF

Info

Publication number
US2949975A
US2949975A US690871A US69087157A US2949975A US 2949975 A US2949975 A US 2949975A US 690871 A US690871 A US 690871A US 69087157 A US69087157 A US 69087157A US 2949975 A US2949975 A US 2949975A
Authority
US
United States
Prior art keywords
jacket
tool
assembly
inner
outer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US690871A
Inventor
Walter A Plummer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PLUMMER WALTER A
Original Assignee
PLUMMER WALTER A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PLUMMER WALTER A filed Critical PLUMMER WALTER A
Priority to US690871A priority Critical patent/US2949975A/en
Application granted granted Critical
Publication of US2949975A publication Critical patent/US2949975A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25DPERCUSSIVE TOOLS
    • B25D17/00Details of, or accessories for, portable power-driven percussive tools
    • B25D17/11Arrangements of noise-damping means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S150/00Purses, wallets, and protective covers
    • Y10S150/901Purses, wallets, and protective covers insulating flaccid cover
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S173/00Tool driving or impacting
    • Y10S173/02Sound muffling

Description

Aug. 23, 1960 w. A. PLUMMER 2,949,975

PNEUMATIC TooL. MUFFLE 3 Sheets-Sheet 1 FIG. 3.

Filed OC. 17, 1957 FIG. l.

FIG. 2.

ull: -u ...Il n

.T lull.

lNvENToR WALTER A. PLUMMER ,sain-zn.

ATTORNEYS Aug. 23, 1960 w. A. PLUMMER 2,949,975

PNEUMATIC TOOL. MUFFLE Filed Oct. 17, 1957 5 Sheets-Sheet 2 FIG. 6. FIG. 7.

mvENToR WALTER A. PLUMMER fu-M ril/4.....

ATTORNEYS Aug. 23, 1960 w. A. PLUMMER PNEUMATIC TOOL MUFFLE 5 Sheets-Sheet 3 Filed Oct. 17, 1957 if HAT/e a/Q/J @6.15. BY

men/EV United States Patent() PNEUMATIC TOOL MUFFLE Walter A. Plummer, 13071 Dickens St., North Hollywood, Calif.

Filed Oct. 17, 1957, Ser. No. '690,871

9 Claims.- (Cl. 181-33) :This invention relates to a mule assembly adapted to be detachably secured about noisy -tools and particularly pneumatic tools of which there are many varieties characterized by their objectionably high noise-operating level.

This application is a continuation-in-part of my cpending `application for United States Letters Patent, Serial No. 631,537, led December 31, 1956 (now abandoned) and entitled Muifle Cover.

For example, it is common experience that the operation of pneumatic tools in the building industry and in the construction and repair of pavements, sewers and in the setting of rivets and the like operations produces noise and vibrations which are most objectionable both to the crew and particularly to other persons in the vicinity. This noise problem has become so serious in certain congested areas, as, for example, near oflices, schools, hospitals, oilice buildings and the like facilities that Work requiring the use of pneumatic tools is expressly prohibited by contract provisions or is required to be performed While ythe occupants of nearby buildings are not present, as during the night time.

Accordingly, it is the primary object of the present invention to provide simple and effective muti-le means adapted to be wrapped about and secured snugly to the noise generating portion of noisy tools without interfering with the use of the tool for its intended purpose.

Another object of the invention is the provision of a sound deadening and muiile jacket provided with closure means by which it may be detachably and securely clamped in place about tools to the end that they may be used in populated places without producing objectionable noise.

Another object is the provision of a muie device adapted to be snugly fitted about noise generating tools and characterized by the simplicity and inexpensive nature of its structure.

Another object of the invention is the provision of a muiile jacket made in separable components to the end that a part which wears faster than others, or which may become damaged in use, can be replaced with a substitute component thereby avoiding the need for an entire new munie assembly.

flhese and other more specific objects will appear upon reading the following specilication and claims and upon considering in connection therewith the attached drawings to which they relate.

Referring now tothe drawings in which the preferred embodiments of the invention are illustrated:

Figure 1 yis an elevational View of a mulle assembly incorporating the invention and shown assembled about the body of a pneumatic hammer of the pavement-breaker type;

Figure 2 is a simlar view taken along line 2 2 on Figure 1;

Figure 3 is an eleva-tional View, partly in section, showing a modified form of the mutile assembly in relation to the main body of a pneumatic tool;

Figure 4 is a perspective view of the inner jacket fully opened and viewed from its interior side;

Figure 5 is a sectional View taken on line 5-5 of Figure 4;

Figure 6 is a perspective view on an enlarged scale of the outer jacket assembly;

'Figure 7 is an enlarged fragmentary sectional view on line 7-7 of Figure 6;

Figure 8 is a sectional View on line 8--8 of `Figure 6;

Figure 9 is a sectional view on line 9-9 of Figure 6;

'Figure l0 is a sectional view on line 10-10 of Figure 9;

Figure l1 is a side elevational View of a further embodiment of the invention assembled about the main body portion of a pneumatic tool;

Figure l2 is a View similar to Figure ll showing the outer jacket assembly in place; and

Figure 13 is an exploded view showing the outer jacket assembly in readiness for assembly over a tool previously incased Within the inner jacket.

Referring to the drawings and more particularly to Figures l and 2, there is shown a muille assembly designated generally 11 in assembled position about a pneumatic tool designated generally 12 and commonly used in breaking pavements. As `is custormary, air exhaust port 12' is located along one side of the hammer body and discharges downwardly.

The mulle assembly comprises an inner jacket designated generally 14, and an outer main jacket designated generally 15, it being understood that the outer jacket fits snugly about the inner jacket and includes portions projecting beyond the ends of the inner jacket and c0- operating therewith in providing a highly eective, soundabsorbing muling cover for all parts of the tool except for the air driven element 45 and operating handles 57. Referring particularly to Figures 4 and 5, Iinner jacket 14 Will be seen to comprise a specially formed flexible blanket-like member having a main body of sound-absorbing material. A particularly effective sound-absorbing material is prepared from a layer 16 of comminuted wood fibers overlaid wtih a layer 17 of reinforcing tibrous material of any suitable nature, spun fiberglass, natural fibers or the like being satisfactory. Soundabsorbing layers 16 and 17 are held assembled between inner and outer fabric cover sheets 18 and 19, respectively, suitably held together along all peripheral edges of the sound-absorbing material by stitching 20.

To facilitate flexing of the thick padding material about the tool and to compensate for the greater circumference on the outer surface of the blanket when assembled to a tool, the sound-absorbing material may be formed with one or more V-shaped channels extending lengthwise of the jacket to permit the inner cover sheet 18 to be stitched directly to outer sheet 19 as indicated at 23 in Figure 5. While only one such groove is shown in the drawings, it will be recognized that one or more additional folding grooves may be provided at suitable points about the circumference of the jacket. However, as here shown, the inner jacket has only one folding groove so positioned as to provide a wide main panel and a relatively narrow panel 25.

yCertain tools have enlargements as well as sections of smaller diameter along the body. In such cases, it is desirable to provide the jacket with sections of larger or smaller circumference as appropriate to lit the tool snugly. If there is any substantial change in the diameter of different parts of the tools to be enclosed, ythe sections of the jacket having varying circumferential dimensions are preferably separated by folding channels or grooves corresponding to that described in connection with stitching 23. A pair of such grooves extend crosswise of jacket 14 near its upper end, stitching 26 serving y to form these grooves and to hold fabric cover 18 secured to outer fabric covering 19 along the bottom of the described groove. 'This groove divides the transverse panels 27 of fthe sound-absorbing' material from the main body of the jacket.

f A feature of importance respecting inner jacket 14 comprises a thicker panel of material 30 extending along that portion of the jacket adapted to overlie air exhaust por-t 12 to the end that the louder noises associated with the operationof this outlet may be absorbed. Panel 30 comprises an extra layer of sound-absorbing material 31 here shown as extending the full length of the inner jacket. This layer is enclosed by a flexible cover layer 18' preferably made of material which lis both impervious to oil and resistant to attack thereby. Cover material 18 is suitably bonded or secured to the adjacent edges of inner cover l@ as by stitching 32.

Although inner jacket 14 may be provided with numerous means for holding it detachably assembled about the main body of tool l2, such as by straps, snap fasteners, hooks and eyes, it is preferable to use slide fastener tapes 22 stitched or otherwise secured along the opposite lateral edges of the jacket. Such a fastener avoids unnecessary bulk and provides a continuous easily opened Seam extending longitudinally of the jacket. Furthermore, by properly locating the slide fastener tapes relative to the edges of the sound-absorbing material, assurance is provided that the edges of the material will be held closely together when the jacket is assembled to the tool.

Referring to Figures 6 to 9, outer jacket 15 is shown as comprising a main body of generally tubular configuration preferably formed from two or more layers 37, 38 of sound-absorbing material. One of these layers may consist of wood fibers and the other fiber glass held laminated together by an inner and outer sheet 39 of fabric sewed together along its edges as indicated at 40. Desirably, the outer covering is formed from heavy-duty canvas or ducking, while Canton flannel is preferred for the inner cover Sheet owing to its excellent sound-absorbing characteristics. Jacket has a split extending longitudinally from its open lower end to its upper end and is adapted to be firmly closed as by a slide fastener 43, this fastener serving to hold the jacket tightly stretched about inner jacket 14 and conveniently providing for the expeditious removal of the jacket from the tool when desired for servicing or otherwise.

The lower end of jacket 15 is closed by an end cap 44 formed of fabric incased sound-absorbent material similar to the main body of the jacket and is provided with a keyhole slot in its end. This slot comprises a central opening `44 and a slot 42 extending to the split 42 along which the slide fastener tapes 43 are secured. The described keyhole slot permits the jacket to be assembled about the lower end of the tool with the drill steel or yother percussively actuated tool extending through opening 44 after which the strap and buckle means 47 is sefcured across split 42 to hold the end cap assembled to the tool.

The upper end of the jacket is provided with an end cap 50 comprising sound-absorbing material 51 incased between inner and outer fabric sheets 52 secured to the upper marginal edges of the main body by stitching 53. 'The inner upper corner of the jacket is formed with an opening 55 to facilitate assembly of the jacket over the yend of one of the supporting handles 57 for pneumatic tool 12, it being understood that the opposite upper corner is suitably formed to permit this corner to be tightly closed about the other handle 57 in the manner indicated in Figure l. The opposite sides of the bag are provided with straps and buckles 58, 59 which can be pulled taut to close the jacket about the underside of the handles 57 to the end that all noise generated within the assembled jacket must pass through multiple layers of sound-absorb- .ing material where .itis effectively absorbed and muffled,

The outer jacket is preferably assembled to' the tool in such manner that thick panel 37, 38 overlies exhaust port 12 and with the compressed air supply line 64 extending through a small opening 61 between the mating edges of the jacket at the upper end of slide fastener 43, the latter cooperating with opening 61 and with straps and buckles 58, 59 thereabove in holding the jacket closed about the tool and the air supply line. i

In Figures 1l to 13 there is shown a thirdembodiment of the invention made generally similar to the double jackets described above but differing in certain respectsA as will be pointed out. The air supply line 64 for pneumatic tool 12 underlies one of the .supporting handles 57', the downwardly directed air exhaust port 65 being in general alignment with the hose connection 64. An inner jacket 14 is formed from multiple layers of sound-absorbing material incased in heavy duty fabric material stitched together along the peripheral edges and having a longitudinal seam extending the full length thereof adapted to be opened or held closed by a slide fastener 2:2. It will be observed the lower end of jacket 14 terminates slightly above the manual operator 66 for tool chucking device 67 operable to clamp or release tool steel 45. As in the first described embodiment, the upper end of jacket 14 terminates below the flange connections securing the handle and valve control for the tool to its main body.

Outer jacket 15 is made generally similar to jacket 15 of Figures 1 to 10 with two principal exceptions. For example, the opposite sides of the jacket are connected together across their upper edges by a web 70 formed by the inner and outer fabric covers of the jacket secured together as by stitching with a relatively thin layer of sound-absorbing material therebetween. This facilitates the compact assembly of the web about the tool handle assembly 57 and the base of control handle 71 for the air valve. The second major difference consists of a readily detachable closure cap designated generally 72 for the lower end of the jacket. This cap includes a heavy layer 73 of sound-absorbing material enclosed between inner and outer cover layers 74 of heavy duty cotton having their outer rims turned up to provide a cylindrical flange 74 split longitudinally at 75 and merging with a keyhole slot 76 adapted to permit assembly of the cap about the drill steel 45. The sides of cap flange 74 to either side of split 75 are provided with straps 77 and 78 arranged to be crossed and to mate with buckle ends 79 on the opposite sides of split 42" extending longitudinally of jacket 15". As in the first described embodiment, the opposite edges of split 42 are preferably `fitted with slide fastener tapes 43 extending the full length of the jacket and enabling the same to be tightly closed about the tool and underlying inner jacket 14". Cap 72 has a strap 80 connected to flange 74 on the opposite side thereof from split 75 and cooperating with a buckle 79 attached to the side wall of the outer jacket to hold the same in closed position.

The separable end cap 72 has important advantages over the integral construction described in the first two embodiments. For example, it is important in the use of pneumatic tools, as for example an air hammer, to press downwardly on the tool through handles V57 toadvance the drill steel 45 into material being worked upon as, for example, a pavement. Upon the breakthrough of the drill steel beyond the rear surface of the whole weight of the tool plus the pressure being applied by the operator is effective to lower the tool abruptly into contact with the top of the pavement with the result that the end cap is crushed and punctured. Even though the workman is cautioned to guard against this happenstance, serious'injury to the cap occurs frequently. YThis presents an unsightly appearance and greatly reduces the effectiveness of the rhume, allowing the noise to escape and nullifying the purpose and effectiveness of the remaining soundvabsorbing material. Were it not for the separable construction of the cap and jacket, the entire jacket would need to be replaced. In the construction shown in Figures 1l to 13 however, it is merely necessary to replace detachable cap 72 with a new one, this being accomplished by the simple expedient of unfastening straps 77. 78 and `80 and retightening them.

As will be appreciated from the foregoing, in each embodiment the inner and outer jackets are preferably assembled to the tool with the slide fasteners for each disposed on diametrically opposite sides of the tool with the result that the two jackets are considerably more effective in absorbing noises produced by the pneumatic tool.

While the particular detachable mulfle cover for pneumatic tools herein shown and disclosed in detail is fully capable of attaining the objects and providing the advantages hereinbefore stated, it is to be understood that it is merely illustrative of the presently preferred embodiments of the invention and that no limitations are intended to the details of construction or design herein shown other than as defined in the appended claims.

I claim:

1. A detachable munie assembly for use in enclosing the noise producing areas of pneumatic tools of the type having a manipulating handle and pneumatically actuated mechanism, said assembly comprising a pair of independent sound-absorbing jackets adapted to be separately assembled about the body of a pneumatic tool in superimposed relation, the smaller one of said jackets being adapted to embrace closely the main body of the tool and the larger one of said jackets having opem'ngs at its upper end adapted to fit closely about the tool handle, and means for separately and detachably securing said jackets about the main body of a pneumatic tool.

2. A mufe assembly as dened in claim l characterized in that each of said jackets is split longitudinally thereof and provided with means for holding the edges of said split securely fastened together with both of said nested jackets drawn taut about the main body of the tool enclosed thereby.

3. A muffle assembly as defined in claim 1 characterized in that the larger of said jackets has a separate and detachable lower end cap provided with an opening facilitating the assembly thereof about a pneumatic tool having a driven tool member extending therefrom, said cap being readily replaceable with a substitute cap upon damage to a previous cap thereby obviating the need for replacing the serviceable main body jackets.

4. A muffle jacket assembly for use in muffling operating noises of pneumatic and the like noisy power tools,

said jacket assembly including a blanket of sound-absorbing material enclosed between inner and outer covering sheets secured to one another along their peripheral edges, the opposite lateral edges of said assembly having slide fastener means extending therealong for holding the same snugly secured about the noise generating portions of a power tool, a detachable end cap for one end of said blanket having provision for the passage therethrough of a driven work tool, and means for holding said end cap detachably to said blanket.

5. A munie assembly as defined in claim 4 characterized in that said end cap includes a thick disk of soundabsorbing material enclosed by flexible covers and having a generally cylindrical flange at the rim thereof adapted to telescope over the outer side wall of said blanket portion when the same is assembled about a power tool.

6. A multiple component muflle assembly for use about noisy power tools to smother operating noises created therewithin when in operation, said assembly including as separable components, an inner jacket, an outer jacket and an end cap each provided with fastener means for holding these components assembled about the noise creating portion of a power tool, said assembly being characterized by the provision of fastener means selectively operable in such manner that said cap is removable independently of said outer jacket and simultaneously therewith at the option of the user.

7. A mule assembly as defined in claim 6 characterized in that said inner jacket has an inner covering at least portions of which are impervious and resistant t0 lubricants normally used with power tools.

8. A mule assembly as defined in claim 6 characterized in that each of said jackets is slit lengthwise thereof and provided with separate slide fastener means for closing the same.

9. A muflle assembly as defined in claim 8 wherein said jackets are adapted to be secured in place in overlapping relation about the noise generating portion of a power tool with said slide fastener means of the separate jackets `generally parallel to but circumferentially offset from one another.

References Cited in the le of this patent UNITED STATES PATENTS 1,115,704 Manes Nov. 3, 1914 2,490,250 Boener Dec. 6, 1949 2,495,636 Hoeltzel Jan. 24, 1950 2,627,887 Becker Feb. l0, 1953 FOREIGN PATENTS 496,454 Great Britain Nov. 30, 1938

US690871A 1957-10-17 1957-10-17 Pneumatic tool muffle Expired - Lifetime US2949975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US690871A US2949975A (en) 1957-10-17 1957-10-17 Pneumatic tool muffle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US690871A US2949975A (en) 1957-10-17 1957-10-17 Pneumatic tool muffle

Publications (1)

Publication Number Publication Date
US2949975A true US2949975A (en) 1960-08-23

Family

ID=24774319

Family Applications (1)

Application Number Title Priority Date Filing Date
US690871A Expired - Lifetime US2949975A (en) 1957-10-17 1957-10-17 Pneumatic tool muffle

Country Status (1)

Country Link
US (1) US2949975A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085611A (en) * 1960-08-18 1963-04-16 Glen Mfg Inc Toilet bowl cover
US3202239A (en) * 1963-06-10 1965-08-24 Clarke Ronald Albert William Acoustic shield for a tool powered by a gas-operated motor
US3225861A (en) * 1963-09-13 1965-12-28 Cons Mining & Smelting Co Sound suppressing device comprising elastic tubular sleeve for air actuated percussive type tools
US3231042A (en) * 1961-06-28 1966-01-25 Mohasco Ind Inc Foldable sound insulating material and partition
US3233699A (en) * 1962-01-02 1966-02-08 Walter A Plummer Heat and sound insulating jacket for exhaust gas muffler and tail pipe assembly
US3379278A (en) * 1967-01-19 1968-04-23 Skowron Carl Muffler for pneumatically powered tools
US3891049A (en) * 1972-09-28 1975-06-24 Bosch Gmbh Robert Pneumatic tool construction
US3990535A (en) * 1975-09-11 1976-11-09 Bruce Jimmie R Vibration damping device for levers
US4981247A (en) * 1989-07-17 1991-01-01 Richard C. Noll Protective cover for an electric stapler
US4986371A (en) * 1990-01-08 1991-01-22 Lowe Wayne L Safety deflector for air hammer and concrete breaker
EP0482327A2 (en) * 1990-09-24 1992-04-29 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Hydraulically operated power circuit with sound damping device
US5272285A (en) * 1992-08-20 1993-12-21 Scott Mfg., Inc. Sound attenuating machinery cover
US5419404A (en) * 1990-05-23 1995-05-30 Bretec Oy Hydraulic impact hammer
US20030159843A1 (en) * 2002-02-22 2003-08-28 Hitachi Koki Co., Ltd. Electric power tool
US20040256173A1 (en) * 2001-09-05 2004-12-23 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20050022548A1 (en) * 2003-07-29 2005-02-03 Sishtla Vishnu M. Sound jacket for noise reduction in refrigeration apparatus
US20070056760A1 (en) * 2002-11-28 2007-03-15 Chikai Yoshimizu Portable tool having cover and label to be stuck on the portable tool for identification
US7341173B1 (en) * 2006-10-05 2008-03-11 Arnold John L Exhaust gas diffuser and filter system for a pneumatic nail gun
US20100133038A1 (en) * 2007-09-21 2010-06-03 Hydac Technology Gmbh Attenuation device,particularly pulsation attenutor
US20110033324A1 (en) * 2009-08-10 2011-02-10 Schaefer James A Compressor Having Counterweight Cover
WO2016133732A1 (en) * 2015-02-19 2016-08-25 Caterpillar Inc. Variable noise attenuating system for a power cell of a hydraulic hammer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1115704A (en) * 1913-12-23 1914-11-03 Edward Manes Pneumatic-hammer muffler.
GB496454A (en) * 1938-04-05 1938-11-30 Albert Walter Christian Mandel Improvements in or relating to gas-pressure actuated percussive drills and the like
US2490250A (en) * 1947-02-20 1949-12-06 Seal Sac Inc Protective cover for pressure cookers
US2495636A (en) * 1944-05-22 1950-01-24 Cons Vultee Aircraft Corp Insulating pad
US2627887A (en) * 1949-06-20 1953-02-10 Becker Brony Violin case cover

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1115704A (en) * 1913-12-23 1914-11-03 Edward Manes Pneumatic-hammer muffler.
GB496454A (en) * 1938-04-05 1938-11-30 Albert Walter Christian Mandel Improvements in or relating to gas-pressure actuated percussive drills and the like
US2495636A (en) * 1944-05-22 1950-01-24 Cons Vultee Aircraft Corp Insulating pad
US2490250A (en) * 1947-02-20 1949-12-06 Seal Sac Inc Protective cover for pressure cookers
US2627887A (en) * 1949-06-20 1953-02-10 Becker Brony Violin case cover

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085611A (en) * 1960-08-18 1963-04-16 Glen Mfg Inc Toilet bowl cover
US3231042A (en) * 1961-06-28 1966-01-25 Mohasco Ind Inc Foldable sound insulating material and partition
US3233699A (en) * 1962-01-02 1966-02-08 Walter A Plummer Heat and sound insulating jacket for exhaust gas muffler and tail pipe assembly
US3202239A (en) * 1963-06-10 1965-08-24 Clarke Ronald Albert William Acoustic shield for a tool powered by a gas-operated motor
US3225861A (en) * 1963-09-13 1965-12-28 Cons Mining & Smelting Co Sound suppressing device comprising elastic tubular sleeve for air actuated percussive type tools
US3379278A (en) * 1967-01-19 1968-04-23 Skowron Carl Muffler for pneumatically powered tools
US3891049A (en) * 1972-09-28 1975-06-24 Bosch Gmbh Robert Pneumatic tool construction
US3990535A (en) * 1975-09-11 1976-11-09 Bruce Jimmie R Vibration damping device for levers
US4981247A (en) * 1989-07-17 1991-01-01 Richard C. Noll Protective cover for an electric stapler
US4986371A (en) * 1990-01-08 1991-01-22 Lowe Wayne L Safety deflector for air hammer and concrete breaker
US5419404A (en) * 1990-05-23 1995-05-30 Bretec Oy Hydraulic impact hammer
EP0482327A2 (en) * 1990-09-24 1992-04-29 Krupp Maschinentechnik Gesellschaft Mit Beschränkter Haftung Hydraulically operated power circuit with sound damping device
EP0482327A3 (en) * 1990-09-24 1993-02-24 Krupp Maschinentechnik Gesellschaft Mit Beschraenkter Haftung Sound damping device for hydraulically operated power circuit
US5272285A (en) * 1992-08-20 1993-12-21 Scott Mfg., Inc. Sound attenuating machinery cover
US20090114475A1 (en) * 2001-09-05 2009-05-07 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20040256173A1 (en) * 2001-09-05 2004-12-23 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20080023260A1 (en) * 2001-09-05 2008-01-31 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US7481296B2 (en) * 2001-09-05 2009-01-27 Brett Eilers Sound reducing device for a coffee grinder and other kitchen appliances
US20060048959A1 (en) * 2002-02-22 2006-03-09 Hitachi Koki Co., Ltd. Electric power tool
US7108079B2 (en) * 2002-02-22 2006-09-19 Hitachi Koki Co., Ltd. Electric power tool
US7681661B2 (en) 2002-02-22 2010-03-23 Hitachi Koki Co., Ltd. Electric power tool
US7665541B2 (en) 2002-02-22 2010-02-23 Hitachi Koki Co., Ltd. Electric power tool with cover
US20030159843A1 (en) * 2002-02-22 2003-08-28 Hitachi Koki Co., Ltd. Electric power tool
US20090014194A1 (en) * 2002-02-22 2009-01-15 Hitachi Koki Co., Ltd. Electric power tool
US20070056760A1 (en) * 2002-11-28 2007-03-15 Chikai Yoshimizu Portable tool having cover and label to be stuck on the portable tool for identification
US20050022548A1 (en) * 2003-07-29 2005-02-03 Sishtla Vishnu M. Sound jacket for noise reduction in refrigeration apparatus
US6932190B2 (en) * 2003-07-29 2005-08-23 Carrier Corporation Sound jacket for noise reduction in refrigeration apparatus
WO2008045127A3 (en) * 2006-10-05 2008-12-31 John L Arnold Exhaust gas diffuser and filter system for a pneumatic nail gun
WO2008045127A2 (en) * 2006-10-05 2008-04-17 Arnold John L Exhaust gas diffuser and filter system for a pneumatic nail gun
US7341173B1 (en) * 2006-10-05 2008-03-11 Arnold John L Exhaust gas diffuser and filter system for a pneumatic nail gun
US20100133038A1 (en) * 2007-09-21 2010-06-03 Hydac Technology Gmbh Attenuation device,particularly pulsation attenutor
US8132645B2 (en) * 2007-09-21 2012-03-13 Hydac Technology Gmbh Attenuation device particularly pulsation attenuator
US20110033324A1 (en) * 2009-08-10 2011-02-10 Schaefer James A Compressor Having Counterweight Cover
US8974198B2 (en) 2009-08-10 2015-03-10 Emerson Climate Technologies, Inc. Compressor having counterweight cover
WO2016133732A1 (en) * 2015-02-19 2016-08-25 Caterpillar Inc. Variable noise attenuating system for a power cell of a hydraulic hammer

Similar Documents

Publication Publication Date Title
US3462027A (en) Dunnage device
US4272849A (en) Flexible form fitting glove
US4411024A (en) Protective glove
US5450858A (en) Lumbosacral belt
US6537308B2 (en) Cosmetic and therapeutic face mask
US5727266A (en) Disposable pillow or cushion cover
DE4101161C2 (en) Quick attractable guard assembly
US4756394A (en) Expandable hand luggage with wheels and separable compartments
US2221758A (en) Surgical dressing
US4231118A (en) Head and face protecting hood
US3022806A (en) Router dust guard
US6000323A (en) Trash compacting method and apparatus
US4901370A (en) Garment for protecting against environmental contamination
US6526585B1 (en) Wet smoke mask
US5782070A (en) Method and apparatus for padding and cushioning an equine saddle
US4220298A (en) Removable soft door for aircraft
US5207303A (en) Medical emergency carrying case
US6209137B1 (en) Video game glove
US4747163A (en) Cyclist gloves
US20020130538A1 (en) Adjustable armrest cushion
US4862533A (en) Sleeping bag and an air mattress
US8966666B2 (en) Weightlifting glove with integrated hand and wrist support
US5603118A (en) Inflatable padded glove
EP1773148B1 (en) Flexible protective helmet
US6516482B2 (en) Institutional bedding with integral pillow and mattress